Dropbox is a cloud storage and file sync platform founded in 2007 in San Francisco, with over 700 million registered users, 2GB free and 2TB paid plans, and an ecosystem spanning Paper, Sign, Capture and AI search, listed on NASDAQ in 2018.
Zimbra is an open-source enterprise collaboration and email platform offering mail, calendar, contacts, and file sharing groupware features.
Redbooth is a US-origin project collaboration platform tracing back to 2008 (formerly Teambox, renamed in 2013), offering 4 task views including kanban and Gantt chart plus built-in video conferencing for remote team collaboration.
Fleep is a team chat and project collaboration tool founded in Tallinn, Estonia in 2014, merging conversations, tasks, files and issue tracking into one thread. The free plan lets small teams start immediately.
eAssistance Pro is a US-based lightweight website live chat software founded in 2004, supporting 20+ languages with a deployable free plan, visitor tracking, and proactive invitations for fast customer support rollout.
Dropbox Business is Dropbox's (founded 2007, San Francisco) enterprise cloud storage and collaboration platform with team folders, 180-day version history, remote wipe, and Dropbox Paper.
Telegram, founded by Pavel Durov in 2013, is a cloud instant messaging app with more than 900 million monthly active users, known for cloud sync, 200,000-member supergroups, 2 GB file transfers and an open Bot ecosystem.